Improvement in liquid-measures



s}R1GBY,sd, E C.P.R1GBY. Liquid Measure.

No. 200,091. lPafented Feb. 5,1878..

.u fm1- i 1j i i; 1i. L c 21:, 2U l l cates the number of UNITED STATES5 EA'iinivjiv OFFICE.

sE'rH meer, 3D, AND CLARK F. meer, or NEWCASTLE, PENNsvLv-ANIA.`

Specification forming part of Letters Patent No. 200,091, dated February5, 1878; application iled August 28, 1877.

To all 'whom it may concern:

Be it known that we, SETE RIGBY, 3d, and CLARK F. RIGBY, of Newcastle,in the county of Lawrence and State of Pennsylvania, have inventedcertain new and useful Improvements in Devices for Measuring Crude Oilsand Liquids of all Kinds; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference beinghad to the accompanying drawings, which form part of thisspecification.

Our invention relates to an improvement in devices for measuring crudeoils and liquids of all kinds 5 and it consists in the combination of atank, measuring-tube, guide-rod, float, and pipes for connecting thetube and tank together, whereby the quantity of oil, by the help ofscales, can be instantly seen, and the dividing-line between the oil andwater shown, as will be more fully described hereinafter.

The accompanying drawings represent our invention.

a represents an ordinary reservoir, of any suitable shape, kind, orconstruction. Gonnected to this reservoir is the measuring-tube b, whichhas a glass ont, so as to allow the height of the liquid in the tank tobe seen, and is provided with a door, c, so as to protect the glassfrominjury. Upon one side of this tube is permanently secured a scale, e,which indipints, quarts, or gallons, and the gures run from the bottomup to the top. Upon the other side is attached a movable gage, g, whichis slotted and provided with a set-screw, h, for holding it in anyposition into which it may be adjusted.

' The permanent scale always indicates the quantity of oil or liquidthat is in the reservoir, while the movable scale indicates the quantitythat has been drawn oft', or acts as a subtracter to show the number ofgallons of each, when there are two kinds of liquid in the tank-as, forinstance, crude oil and water.

' In this measuring-tube is placed the wire rod i, upon which the floatl moves. This float is so constructed that it will rise to the exactlevel of the water in the tank, and no farther.

When there is both oil and water in the tank the two will mix slightlytogether, so that the exact water and oil line can never bedistinguished in the tube.

In order to avoid this difficulty the float is constructed so that whileit will rise to the top of the water, it will not float in the oil atall,

and as a consequence the top edge of the iioat is raised just to the topof the water, and thus indicates very plainly where the dividing-lineis. Through the top of the tube, where the upper end of this wire passesthrough, is made a suitable hole, so as to enable the air to pass freelyin and out, and upon the top of the rod is placed a stop, so as to holdit always in position. A

Leading from the bottom of the tank is a pipe, a, which is provided witha stop-cock, o, for shutting off the liquid from the tube wheneverdesired. From this pipe there is a smaller branch, r, which connectswith the tube, so that when the stop-cock 0 is opened the liquid risesin the tube to the same height that it is in the reservoir. Leading fromthe bottom of the tube is another stop-cock, s, through which the tubemay be emptied whenever desired. In the end of the pipe a is placedanother stop-cock, t, through which the liquid from the tank may bedrawn off whenever desired.

Passing from the side of the tank into the tube, at dierent elevations,are two or more pipes, u u', which are provided with stopcocks, so thatthe liquid may be shut off from the tube whenever desired. One or moreof these pipes, u', are absolutely necessary to balance or equalize thegravity of the oil in the tube to the gravity of the oil in the tank. Ifthese tubes are not provided, the oil in the tubes will not find thebottom line between the oil and the water.

We broadly disclaim the invention of a lioat which rises only to thelevel of the water, and thus shows the dividing-line between the oil andthe water.

We also disclaim the invention of the tube b, which is connected to thetank by means of suitable connecting-tubes, so as to indicate the levelof the oil in the tank.

Having thus described our invention, we claimf 1. The combination of threservoir co', tube Y In testimony that we claim the foregoing b, xedguide-rod ,ioat l, sliding thereon, Weliave hereuntoset our hands this24th dayV i and pipes 'n u u, substantially as shown. Y of August7 187 7.i

2. In combination with the measuring-tube g Y Y Y of a reservoir, timeJrigid scale having the; VSETH RIGBY, SIL Y quantity of oil Vcontained inthe reservoir g Y CLARK FREE RIGBY.

marked on it'from its bottom toward its-top, Y' and an adjustable gagehaving the iigures Witnesses:

marked from the top to the bottom', and which D.V VJ. STEWART, Y Y isprovided with ay set-screw, h, `for holding it Y WM. Si BINNING.

in any position, substantially as set forth.-

